Blacklists Compared

24 February 2007

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison | Sendmail Configuration ]


Survey results for all known public IP-based DNS blacklists. Lookups were done on connecting IP addresses. The "union of most IP zones" line excludes the exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com iadb.isipp.com, and iadb2.isipp.com zones because they are not blacklists. Because it is too aggressive to be widely useful the block.blars.org zone is also excluded.

HitsDNS Zone
140112(total number of IP addresses tested, including 495 at SDSC)
131722(union of most IP zones)
107846t1.dnsbl.net.au
102119zen.spamhaus.org (union of all results)
80661dnsbl.sorbs.net (union of all results)
76823no-more-funn.moensted.dk (union of all results)
70835sbl-xbl.spamhaus.org (union of all results)
70248xbl.spamhaus.org (union of all results)
69645cbl.abuseat.org
69560xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
69558sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
69555zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
67571block.blars.org
66602dynablock.njabl.org
66598pbl.spamhaus.org (union of all results)
66168blackholes.five-ten-sg.com (union of all results)
66134psbl.surriel.com
65543dnsbl.tqmcube.com (union of all results)
63278dnsbl.sorbs.net (result 127.0.0.10 = dialup)
62388zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
62388pbl.spamhaus.org (result 127.0.0.11 = Spamhaus entry)
61035blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
52252no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
41479dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
40310dnsbl-1.uceprotect.net
30608l2.apews.dnsbl.uceprotect.net
26561dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
26101dnsbl-2.uceprotect.net
24603bl.spamcop.net
17004wpbl.dnsbl.net.au
15346no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
13951dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
12588unconfirmed.dsbl.org
12482list.dsbl.org
12474dsbl.dnsbl.net.au
10810dnsbl-3.uceprotect.net
10109cn-kr.blackholes.us (result 127.0.0.2 = China)
10109cn-kr.blackholes.us (union of all results)
10082bl.csma.biz
9003no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
8779unsure.nether.net
8721dnsbl.tqmcube.com (result 127.0.0.5 = China)
7875dnsbl.tqmcube.com (result 127.0.0.4 = South Korea)
7866korea.services.net
7167ix.dnsbl.manitu.net
6982ubl.unsubscore.com
6527china.blackholes.us
6126tr.countries.nerd.dk
5638mail-abuse.blacklist.jippg.org
5322blacklist.spambag.org
4470dnsbl.njabl.org (union of all results)
4213zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4213pbl.spamhaus.org (result 127.0.0.10 = ISP contributed)
4207rmst.dnsbl.net.au
4125dnsbl.njabl.org (result 127.0.0.9 = open proxy)
4029blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3284korea.blackholes.us
2924dnsbl.ahbl.org (union of all results)
2787bl.spamcannibal.org
2765dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2584dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2193spamsources.fabel.dk
2143zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2143xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2143sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1754probes.dnsbl.net.au
1543turkey.blackholes.us
1445list.dnswl.org (not a blacklist!)
1071russia.blackholes.us
944blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
905dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
721zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
721sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
721sbl.spamhaus.org
702dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
668japan.blackholes.us
650thailand.blackholes.us
611taiwan.blackholes.us
611blackholes.uceb.org (union of all results)
566blackholes.uceb.org (result 127.0.0.6 = spam haven)
508malaysia.blackholes.us
291blackholes.uceb.org (result 127.0.0.3 = spam source)
256no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
211no-more-funn.moensted.dk (result 127.0.0.9 = misc)
186dnsbl.njabl.org (result 127.0.0.4 = spam source)
165query.bondedsender.org (not a blacklist!)
145work.drbl.croco.net
143dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
139dnsbl.njabl.org (result 127.0.0.2 = open relay)
133singapore.blackholes.us
114accredit.habeas.com (not a blacklist!)
105iadb.isipp.com (not a blacklist!)
101blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
93hongkong.blackholes.us
87multihop.dsbl.org
75flowgoaway.com
68spam.wytnij.to
68argentina.blackholes.us
62bl.deadbeef.com
55blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
55dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
46sbl.csma.biz
33dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
29blackholes.uceb.org (result 127.0.0.5 = dialup)
26tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
26ohps.dnsbl.net.au
26tor.dnsbl.sectoor.de (union of all results)
20dnsbl.njabl.org (result 127.0.0.3 = dialup)
18relays.nether.net
17mexico.blackholes.us
15multi.surbl.org
15dnsbl.ahbl.org (result 127.0.0.15 = open relay)
14spamguard.leadmon.net (union of all results)
13dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
12osps.dnsbl.net.au
12spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
12exemptions.ahbl.org (not a blacklist!)
10rdts.dnsbl.net.au
6osrs.dnsbl.net.au
4blackholes.uceb.org (result 127.0.0.2 = open relay)
4blackholes.brainerd.net
3nigeria.blackholes.us
3owps.dnsbl.net.au
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
1blackholes.five-ten-sg.com (result 127.0.0.13 = challenge-response source)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
140112(total number of IP addresses whose names were tested, including 495 at SDSC)
82278(union of all domain zones)
59761rddn.dnsbl.net.au
52974abuse.rfc-ignorant.org
39860dynamic.rhs.mailpolice.com
38794l1.apews.rhsbl.uceprotect.net
29326whois.rfc-ignorant.org (union of all results)
15786whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
13541whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3823webmail.rhs.mailpolice.com
580postmaster.rfc-ignorant.org
508adv.rhs.mailpolice.com
357multi.surbl.org
215multi.uribl.com (union of all results)
214multi.uribl.com (result 127.0.0.2 = spam resource)
157rhsbl.ahbl.org
132bl.deadbeef.com
118bulk.rhs.mailpolice.com
87dsn.rfc-ignorant.org (zone not intended for this use)
86bogusmx.rfc-ignorant.org
6porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1blackhole.securitysage.com
1rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
1rhsbl.sorbs.net (union of all results)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains.

HitsDNS Zone
74921(total number of domains tested, including 479 at SDSC)
15655(union of all domain zones)
6976whois.rfc-ignorant.org (union of all results)
6343whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3972abuse.rfc-ignorant.org
2139webmail.rhs.mailpolice.com
2000multi.surbl.org
1504postmaster.rfc-ignorant.org
1402multi.uribl.com (union of all results)
1364multi.uribl.com (result 127.0.0.2 = spam resource)
1002bogusmx.rfc-ignorant.org
852dsn.rfc-ignorant.org
633whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
348rhsbl.ahbl.org
342porn.rhs.mailpolice.com
248bulk.rhs.mailpolice.com
181adv.rhs.mailpolice.com
140blackhole.securitysage.com
72rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
72rhsbl.sorbs.net (union of all results)
55l1.apews.rhsbl.uceprotect.net
36multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
29rddn.dnsbl.net.au (zone not intended for this use)
12ex.dnsbl.org
8dynamic.rhs.mailpolice.com
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2bl.deadbeef.com
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 2 March 2007.